作者:Béatrice Bonnet、Yann Le Gallic、Gérard Plé、Lucette Duhamel
DOI:10.1055/s-1993-25999
日期:——
1,1-Diiodoalkenes 1 were readily prepared from carbonyl compounds 2 and diethyl diiodomethylphosphonate (3), generated in situ from commercial diethyl iodomethylphosphonate (4) or diethyl methylphosphonate (5). Starting from aldehydes, iodoacetylenes 6 could be obtained directly in situ by dehydrohalogenation of diiodoalkenes 1.
Synthesis of the four enantiomerically-pure isomers of 15-F2t-isoprostane
作者:Douglass F. Taber、Kazuo Kanai
DOI:10.1016/s0040-4020(98)83038-x
日期:1998.9
Syntheses of the four enantiomerically-pure isomers of 15-F2t-isoprostane are described. The key step is the lipase-mediated resolution of a pseudo-meso diol, to give the regioisomeric acetates in high enantiomeric purity. Improved procedures for the preparation of the pseudo-meso diol are also reported.
Effect of A(1,3)-cis strain on the asymmetric epoxidation of (E)- and (Z)-6,6-diethoxy-3-hexen-2-ols and 4-methyl-6,6-diethoxy-3-hexen-2-ols
作者:Antonia A. Nikitenko、Boris M. Arshava、Irina G. Taran、Igor E. Mikerin、Vitaly I. Shvets、Yuri E. Raifeld、Stanley A. Lang、Ving J. Lee
DOI:10.1016/s0040-4020(98)83034-2
日期:1998.9
The effect of A((1,3))-cis strain on the diastereoselectivity of epoxidation of (E)-and (Z)-6,6-diethoxy-3-hexen-2-ols and 4-methyl-6,6-diethoxy-3-hexen-2-ols is analyzed, with some empiric observations provided. Increased A((1,3))-cis strain results in increased amounts of racemic threo-epoxy alcohols, while high ee's are found for the erythro-epoxy alcohols. (C) 1998 Elsevier Science Ltd. All rights reserved.
Makin, S. M.; Kruglikova, R. I.; Shavrygina, O. A., Journal of Organic Chemistry USSR (English Translation), 1987, vol. 23, # 10, p. 1850 - 1852
作者:Makin, S. M.、Kruglikova, R. I.、Shavrygina, O. A.、Kolobova, T. P.、Popova, T. P.、Tagirov, T. K.
DOI:——
日期:——
Makin, S. M.; Kruglikova, R. I.; Popova, T. P., Journal of Organic Chemistry USSR (English Translation), 1982, vol. 18, # 5, p. 834 - 837
作者:Makin, S. M.、Kruglikova, R. I.、Popova, T. P.、Chernyshev, A. I.